CN106884428B - A kind of constructing device of the ventilative pipe pile composite foundation of carbonization mixing pile- - Google Patents
A kind of constructing device of the ventilative pipe pile composite foundation of carbonization mixing pile- Download PDFInfo
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- CN106884428B CN106884428B CN201710224418.4A CN201710224418A CN106884428B CN 106884428 B CN106884428 B CN 106884428B CN 201710224418 A CN201710224418 A CN 201710224418A CN 106884428 B CN106884428 B CN 106884428B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/62—Compacting the soil at the footing or in or along a casing by forcing cement or like material through tubes
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention relates to a kind of constructing devices of ventilative pipe pile composite foundation of carbonization mixing pile-, belong to the technical field of civil construction project basement process.For the deficiency in current composite foundation and carbonization reinforcement means, retain the technological merit of various methods, there is provided that a kind of bearing capacity is high, construction efficiency is high, reliable in quality and low-carbon environment-friendly carbonization magnesia cement soil pipe pile composite foundation, the constructing device includes mixing pile producing device, ventilative tubular pole perforation device and sealing carbonizing plant, so as to meet strengthening soft foundation and the needs of Resources of Carbon Dioxide utilizes.
Description
Technical field
The present invention relates to a kind of constructing devices of ventilative pipe pile composite foundation of carbonization mixing pile-, belong to civil construction project
The technical field of basement process.
Background technique
In the construction of existing civil construction project, it is often necessary to, compressibility low to intensity be big and poor permeability etc. it is deep
Thick-soft base carries out consolidation process, and common method for processing foundation has heavy-tamping method, cushion, cement/lime mixing pile method, steel
Rib concrete pile and cast-in-situ bored pile etc..And Pounding Method noise is big, the scope of application is small, is not suitable for the Muddy Bottoms of high-moisture percentage
Weak soil；Groundsill treatment project amount is big, cost is higher, is only applicable to shallow layer foundation.Cement/rendzinas mixing pile Fa Yinshi
The advantages that work speed is fast, disturbance is small, at low cost and be widely used, but this method make because reinforcement depth is limited bearing capacity it is limited,
Low, quality control difficulty of intensity etc., is difficult to meet engine request sometimes.Though reinforced concrete pile intensity is high, rigidity is high but cost is high,
When composite pile reaches the limit of bearing capacity, soil is first destroyed around pile body, and prevents pile strength from being not fully exerted, passing through
Ji property is deteriorated.Easily there is phenomena such as collapse hole, necking down when constructing in cast-in-situ bored pile method, or even erosion of the underground water to concrete occurs
Problem.
For this purpose, researcher finds new construction method or curing materials actively to improve the processing of foundation stabilization effect
Fruit." JCJ/T 327-2014 stiff composite pile technical regulation " is proposed granular pile, flexible pile (such as cement mixing pile) and rigidity
Two or three of progress combined processing ground in stake (such as precast reinforced concrete piles or bored concrete pile), about composite pile at present
Base has many patents of invention, as the construction method (patent No.: ZL 2,014 1 0088076.4) of composite pile, high powerful core are multiple
Close pile construction method (application number: 201510504437.3), the construction method of extra high load bearing capacity stiff composite pile (application number:
201510098526.2), the construction method (application number: 201610079641.X) of polynary stiff composite pile, have high-durability
The composite pile of protective layer and its production and construction method (patent No.: ZL 2,008 1 0118790.8), the porous coagulation of big partial size
Soil-sand core pile composite foundation and processing method (patent No.: ZL 2,014 1 0155063.4), stake earth concrete integration are compound
Stake and its construction method (application number: 201610027425.2) and composite reinforced concrete pile and its manufacturing device and manufacturing method
(application number: 201410453494.9) etc., compared with single pile body, these composite piles have unique advantage, as sand pile is compound
Ground is mostly used to reinforce sand and silt foundation, and bearing capacity can be improved, reduce sedimentation, prevent liquefaction of soil mass；Cement mixing method
The stiff composite pile formed in conjunction with reinforced concrete pile can either give full play to the high-bearing capacity of reinforced concrete pile, undertake greatly
Fractional load, while can use cement mixing method again and its load is transmitted in pile body surrounding soil, significantly reduce construction
Cost.But the peripheral pile body of these composite piles is largely cement/rendzinas mixing pile, with reinforced concrete pile above-mentioned and
Cast-in-situ bored pile etc. is similar, and gain in strength is slow, and curing materials used are mainly cement and lime, and material consumes in process of production
Energy is high, CO2 emissions are big, environmental pollution is serious.
In addition, inventor seminar proposes carbonization mixing pile method and whole carbonizatin method using magnesia to carry out weakness
The consolidation process of ground has applied for serial patent of invention, and the similar feature and beneficial effect of these patents of invention are: with activity
Oxide is passed through carbon dioxide and is carbonized to realize the rapid reinforcement of weak foundation soil as soil body curing agent.Compared to
Cement solidification soil or tradition stirring robin, these methods have the characteristics that reinforcing speed is fast, intensity is high, environmental benefit is good, meet
The development trend of civil engineering green construction.However, there is also corresponding defects for these existing patents, such as: a kind of carbon of soil
Change curing method and its device (patent No.: ZL 201010604013.1), is a kind of using industrial waste gas thermal consolidating soft soil foundation
Processing system and method (patent No.: ZL 201310122135.0) and a kind of processing system and carbonization for foundation stabilization at
Piling method (patent No.: ZL201410203978.8) belongs to carbonization stirring piling method, and mixing pile depth is limited in construction, it is difficult to
Meet loading capacity of engineering needs；Carbon dioxide gas easily leaks along agitating shaft, generates secondary pollution；Carbon dioxide foaming is sent out
Infusion and its stablize the time it is more demanding, add additional subsoil soil's water content and porosity, intensity increase is not very
Obviously, for particularly with the subsoil of high-moisture percentage, consolidation effect is worse.In addition, bed course is filled out in a kind of changing for soft soil foundation
Be carbonized reinforcement means (patent No.: ZL 201410272957.1) and a kind of shallow-layer soft foundation in-situ carburization solidification processing method
(patent No.: ZL 2,015 1 0348797.9) belongs to the scope of shallow layer foundation processing, and reinforcement depth is limited, easily occurs uneven
Even sedimentation, it is difficult to meet the reinforcing needs of deep weak subgrade soil；And the mixture for using different-grain diameter carries out large area and changes
It fills out, increases the project amount and cost of basement process, reduce construction efficiency.
It is carbonized in the presence of reinforcement means not in conjunction with the reinforcement technique and magnesia of current deep weak subgrade composite pile
Foot and problem, the advantage of status and novel carbonization consolidated subsoil method based on China's engineering construction fast development, how shape
At a kind of NEW TYPE OF COMPOSITE ground for cooperateing with raising, high construction efficiency and low-carbon environment-friendly with stake soil body collective effect, bearing capacity, have become
The important topic urgently researched and developed for industry.
Summary of the invention
The present invention retains the technological merit of various methods for above-mentioned composite foundation and the deficiency being carbonized in reinforcement means,
There is provided that a kind of bearing capacity is high, construction efficiency is high, reliable in quality and low-carbon environment-friendly carbonization magnesia cement soil pipe pile composite foundation,
Reach the demand that strengthening soft foundation and Resources of Carbon Dioxide utilize.
In order to realize this goal of the invention, we disclose a kind of constructions of ventilative pipe pile composite foundation of carbonization mixing pile-
Device, the constructing device include:
Mixing pile producing device, the mixing pile producing device includes support frame, is provided on the support frame dynamic
Power head, the power head lower part are connected with hollow drill, and shotcrete pipe, the hollow drill are installed in the hollow drill
Bottom be fixedly connected with augers, stirring blade, the stirring blade are fixed between hollow drill and augers
Lower part is equipped with sawtooth head, and gunniting hole and powder injection hole, the gunniting hole and spray are provided between stirring blade and augers
Starch seal of tube connection, the bottom connection of the powder injection hole and hollow drill；Moisture content is additionally provided in the bottom of augers
Probe；Realize the agitating function in mixing pile producing device jointly by these above-mentioned components；Shotcrete pipe by feed pipe for mortar with
Slurry can sealed bottom connects, and is provided with flow valve a on the feed pipe for mortar；Hollow drill passes through duff pipe and storage powder pot bottom
It is tightly connected, is provided with flow valve b on the duff pipe；At the top of the slurry can and storage powder tank top passes through snorkel
It is connect with compression pump, pressure regulator valve a is provided between snorkel and slurry can, be provided with pressure regulation between snorkel and storage powder tank
Valve b；Compression pump and control system, the support frame, slurry can, storage powder tank, compression pump and set-up of control system are in stride vehicle
On；By these components, the curing agent functions of physical supply in mixing pile producing device is realized jointly；The described moisture content probe,
Flow valve a and flow valve b are both connected in control system；To realize the control function to entire mixing pile producing device；
Ventilative tubular pole perforation device, the ventilative tubular pole perforation device includes chassis, handling apparatus and piling system；Institute
The chassis stated is arranged on stride vehicle, and the handling apparatus includes dynamical system, upending frame and suspension hook, in the handling apparatus
Dynamical system) and piling system be fixed on chassis.
Seal carbonizing plant, the sealing carbonizing plant includes seal closure, the seal closure by being sequentially connected
Connecting rod, hydraulic stem, power arm are connected to hydraulic device；The hydraulic device is arranged on flat car；On the flat car also
It is provided with centralized control equipment and feeder, feeder is connected to the fast joint being arranged at the top of seal closure by gas-guide tube, is leading
Pressure regulator valve c is provided on tracheae；The seal closure side wall is installed on temperature sensor and moisture sensor；The temperature
Sensor, moisture sensor and pressure regulator valve c are both connected on centralized control equipment.
Preferably, the power arm is to be connected to be formed by two section power forearms.
It is further preferable that the upending frame is triangular in shape, suspension hook is fixed on vertex.
Using the constructing device on the ventilative tubular pole composite base ground of this carbonization mixing pile-, bearing capacity height, construction effect can be formed
The carbonization magnesia cement soil pipe pile composite foundation of rate height, reliable in quality and low-carbon environment-friendly, reaches strengthening soft foundation and dioxy
Change the demand that carbon resource utilizes.
Particularly, realize it is following the utility model has the advantages that
(1) mixing pile producing device and ventilative tubular pole perforation device are located at jointly on stride vehicle, avoid ventilative tubular pole two
The error that secondary alignment generates, easy to operate, construction efficiency is high.
(2) during mixing pile construction, the moisture content that measures of being popped one's head according to moisture content is to curing agent pulvis and slurries
Flow is adjusted, and makes mixing pile moisture control in OK range；Furthermore in carbonisation, according to carbonization soil's water content
Suitable carbon dioxide venting pressure and carbonization time are selected with temperature results, is optimal the carbonization effect of mixing pile.
(3) carbonization magnesia cement soil mixing pile and the collaboration of ventilative tubular pole carry, temper toughness with gentleness, and have given full play to pile body week
The frictional force and end resistance of the soil body are enclosed, coordinating carrying improves bearing capacity of single pile, and the squeezing action of ventilative tubular pole is also shown
The density for improving soil among carbonization mixing pile and pile body is write, the intensity of soil among carbonization mixing pile and pile body is increased, into
And bearing capacity, uniformity and the stability of composite foundation are improved, compressibility reduces.
(4) tubular pole of breathing freely passes through the side transferred the load in carbonization magnesia cement soil mixing pile and pile body surrounding soil
Formula, reduces the soil strength requirement of supporting course, i.e., shorter composite pile can also meet design requirement.
(5) tubular pole of breathing freely is prefabricated reinforced concrete hollow pile, and seal closure is equipped at the top of compound pile body, avoids two
Loss of the carbon oxide gas at the top of pile body increases migration and diffusion of the carbon dioxide in magnesia cement soil stirring pile body
Efficiency improves the uniformity of carbonization effect；The curing agent used that is carbonized is magnesia cement and carbon dioxide gas, has low-carbon
The characteristics of environmental protection and sustainable development.
Detailed description of the invention
Fig. 1 is carbonization magnesia cement soil pipe pile composite foundation constructing structure overall schematic；
In figure: 1- stride vehicle, 2- support frame, 3- power head, 4- hollow drill, 5- shotcrete pipe, 6- stirring blade, 7- sawtooth
Head, 8- gunniting hole, 9- powder injection hole, 10- augers, 11- moisture content probe, 12- slurry can, 13- store up powder tank, 14- pressure regulator valve
A, 15- pressure regulator valve b, 16- snorkel, 17- compression pump, 18- feed pipe for mortar, 19- flow valve a, 20- duff pipe, 21- flow valve b,
22- control system, 23- mixing pile, the chassis 24-, 25- dynamical system, 26- upending frame, 27- suspension hook, 28- piling system, 29- are saturating
Tracheae stake, 30- flat car, 31- hydraulic device, 32- power arm, 33- hydraulic stem, 34- connecting rod, 35- seal closure, 36- temperature
Sensor, 37- moisture sensor, 38- fast joint, 39- centralized control equipment, 40- feeder, 41- gas-guide tube, 42- pressure regulator valve
C, 43- carbonization mixing pile.
Specific embodiment
In the description of the present invention, it is to be understood that, belong to the instruction such as "upper", "lower", "top", "bottom", "inner", "outside"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and the description present invention is merely for convenience of, without referring to
Show or imply the particular orientation that must have in signified device, therefore should not be understood as limitation of the invention.In order to make this hair
The technological means of bright realization, creation characteristic, achieving the goal is readily apparent from understanding with effect, below with reference to diagram, to the present invention into
Row is further described.
Embodiment 1
With reference to Fig. 1, a kind of constructing device of carbonization mixing pile-ventilative pipe pile composite foundation (CMP), the constructing device packet
Include mixing pile producing device, ventilative tubular pole perforation device and sealing carbonizing plant；The mixing pile producing device includes stirring
Device assembly, curing agent supply device component and control system 22；The ventilative tubular pole perforation device includes chassis 24, handling
Device assembly and piling system 28；The sealing carbonizing plant includes seal component, centralized control equipment 39 and feeder
40。
The agitating device includes support frame 2, power head 3, hollow drill 4, augers 10, slurry can 12, Chu Fen
Tank 13, compression pump 17 and control system 22, the support frame 2, slurry can 12, storage powder tank 13, compression pump 17 and control system
22 are arranged on stride vehicle 1, power head 3 are provided on the support frame 2,3 lower part of power head is connected with hollow drill
4, shotcrete pipe 5 is installed in the hollow drill 4, and the bottom of the hollow drill 4 is fixedly connected with augers 10, institute
The stirring blade 6 stated is fixed on the lower part of hollow drill 4 and is located at the top of augers 10,6 lower part of stirring blade
Equipped with sawtooth head 7, gunniting hole 8 and powder injection hole 9 are provided between stirring blade 6 and augers 10, in augers 10
Bottom is provided with moisture content probe 11.
12 top of slurry can and 13 top of storage powder tank is connect by snorkel 16 with compression pump 17, in snorkel
It is provided with pressure regulator valve a 14 between 16 and slurry can 12, is provided with pressure regulator valve b 15 between snorkel 16 and storage powder tank 13；Institute
12 bottom of slurry can stated is tightly connected by feed pipe for mortar 18 and shotcrete pipe 5, and 13 bottom of storage powder tank passes through duff pipe 20
It is tightly connected with hollow drill 4；It is provided with flow valve a 19 on the feed pipe for mortar 18, is provided with stream on the duff pipe 20
Measure valve b 21；The gunniting hole 8 and shotcrete pipe 5 is tightly connected, and the powder injection hole 9 is connect with the bottom of hollow drill 4；Institute
Moisture content probe 11, flow valve a 19 and the flow valve b 21 stated is both connected in control system 22.
The chassis 24 is arranged on stride vehicle 1, and the handling apparatus includes dynamical system 25, upending frame 26 and hangs
Hook 27, dynamical system 25 and piling system 28 in the handling apparatus are fixed on chassis 24.
The sealing device includes hydraulic power unit 31, power arm 32, hydraulic stem 33, connecting rod 34 and seal closure
35, the hydraulic power unit 31, centralized control equipment 39 and feeder 40 are arranged on flat car 30；The hydraulic stem 33
It is connect by power arm 32 with hydraulic power unit 31, one end of connecting rod 34 is fixedly connected with hydraulic stem 33, connecting rod 34
The other end is fixedly connected with seal closure 35；Connector 38,35 side wall of the seal closure peace are provided at the top of the seal closure 35
Equipped with temperature sensor 36 and moisture sensor 37.
One end of the gas-guide tube 41 is connect with feeder 40, and the other end of gas-guide tube 41 is connect with connector 38, is being led
Pressure regulator valve c 42 is provided on tracheae 41；Temperature sensor 36, moisture sensor 37 and the pressure regulator valve c 42 is all connected with
On centralized control equipment 39.
In use, being passed through using the constructing device of the ventilative pipe pile composite foundation of carbonization mixing pile-disclosed by the invention following
Step realizes the acquisition of the ventilative pipe pile composite foundation of carbonization mixing pile-:
A. place flattens, and stake machine is in place, by 10 perpendicular alignmnet subsoil of the hollow drill 4 of stake machine and augers
If fixed pile；
B. starting mixing pile machine is to injection state, until the setting of 10 spinning injection of augers to subsoil is deep
At degree, the augers 10 cuts subsoil soil, and the stirring blade 6 is broken and stirs subsoil soil；
C. starting mixing pile machine is stirred and is promoted while spraying magnesia cement to state is promoted, in whipping process,
According to measured moisture content and predicted cure agent volume, flow valve a 19 and flow valve b 21 is adjusted come to reach mixing pile 23
Target volume completes the first one-step forming of mixing pile 23；
D. brill is bored and mentioned down again in the way of in step b, c, magnesia cement soil stirring 23 is carried out once multiple
It stirs, until magnesia cement is uniformly distributed in magnesia cement soil stirring 23；
It e., will be in ventilative tubular pole 29 vertically indentation mixing pile 23 before the solidification of magnesia cement soil；
F. in the top indentation sealing cover 35 of magnesia cement soil mixing pile 23 and ventilative tubular pole 29, and in ventilative tubular pole
Gas-guide tube 41 is inserted at 29 centers；
G. it opens pressure regulator valve c 42 and adjusts venting pressure, diffuse to carbon dioxide gas by ventilative tubular pole 29 and stir
It mixes in stake 23, ventilation carbonization is carried out to mixing pile 23 and forms carbonization mixing pile 43, complete carbonization mixing pile-and breathe freely tubular pole compoundly
The construction of base.
Curing agent used in mixing pile 23 is magnesia cement, i.e., activated magnesia, activated magnesia and quick lime is mixed
Close the mixture or activated magnesia of object, activated magnesia and cement and the mixture of quick lime and cement；Ventilative tubular pole 29 is
Hollow precast reinforced concrete piles.The magnesia cement can be powder or slurries, powder from powder injection hole 9 spray, slurries from
Gunniting hole 8 sprays, and according to the subsoil moisture content that moisture content probe 11 is measured, selective oxidation magnesium cement is with powder or slurries shape
Formula sprays.
When moisture content is less than 10%, magnesia cement sprays as a slurry；When moisture content is greater than 20%, magnesia water
Mud sprays in powder form；When moisture content is between 10% and 20%, powder may be selected and slurries spray simultaneously.The magnesia
The diameter of cement mixing method 23 is 500-2000 mm, and the outer diameter for tubular pole 29 of breathing freely is 300-1000mm.The ventilative tubular pole 29
Can by it is hydraulic or beat indentation magnesia cement soil mixing pile 23 in, the length of the ventilative tubular pole 29 can be greater than or equal to
The pile body length of magnesia cement soil mixing pile 23.When the length of ventilative tubular pole 29 is greater than the pile body of magnesia cement mixing pile 23
When length, magnesia cement solidified earth or concrete can be filled in ventilative tubular pole 29 to 23 bottom of magnesia cement mixing pile
At height.
The seal closure 35 is made by rigid plastics or stainless steel.The area coverage of seal closure 35 is greater than or equal to magnesia
The cross-sectional area of cement mixing pile 23, the sidewall depth of seal closure 35 can be 100-1000mm.According to seal closure in carbonisation
The temperature sensors 36 of 35 side walls and 37 test result of moisture sensor adjust Carbon dioxide air pressure and carbonization time.Generally
Ground, the venting pressure are not less than 200 kPa, and the basis of time soil nature of Tonghua carbonization determines, when the soil body is sand, leads to
Gas carbonization time is 3.0-6.0 h, and when the soil body is silt, ventilation carbonization time is 6.0-12.0 h, when the soil body is clay,
Ventilation carbonization time is 8.0-12.0 h.
Embodiment 2
If subsoil 1 is sand, away within the scope of earth's surface 5m, subsoil moisture content is less than 10%；Away from earth's surface 5-
Within the scope of 10 m, subsoil moisture content is 10%-20%；When being greater than 10 m away from earth's surface depth, subsoil moisture content is greater than
20%.The powder volume of magnesia cement is selected as 10%, selects activated magnesia as curing agent, is 0.8 by water/dry powder quality ratio
Produce magnesia cement slurries.According to design requirement, the diameter of mixing pile is set to 1200 mm, and stirring depth is set to 10 m, breathes freely
The outer diameter of tubular pole 29 is 400 mm, and the length of single ventilative tubular pole 29 is 10 m.
The specific steps of construction are as follows:
A. 10 perpendicular alignmnet subsoil 1 of stake driver drilling rod 4 and augers is first set into fixed pile；
B. starting mixing pile machine is to injection state, until by 10m depth under 10 spinning injection to earth's surface of augers,
Augers 10 cuts sand, and stirring blade 6 stirs sand；
C. starting mixing pile machine in away from earth's surface 10m depth bounds below, is sprayed to state is promoted using dry sprayig process
Magnesia cement powder is stirred and is promoted while spraying magnesia cement powder, in the range of away from earth's surface 5-10m, using spray
Powder method and mortar gunite method carry out simultaneously, in the range of away from earth's surface 5m, spray magnesia cement using mortar gunite method, complete magnesia water
The first one-step forming of soil stirring pile body 23；
D. brill is bored and mentioned down again in the way of in step b, c, magnesia cement soil mixing pile 23 is carried out once multiple
It stirs, until magnesia cement is uniformly distributed in magnesia cement soil mixing pile 23；
E. and then, a ventilative tubular pole 29 is vertically pressed by magnesia cement soil mixing pile 23 by vibration hammer play
In body；
F. in the top indentation sealing cover 35 of magnesia cement soil mixing pile 23 and ventilative tubular pole 29, wherein seal closure 35
Diameter be 1200mm, Sidewall Height 800mm, and in ventilative tubular pole 29 be inserted into gas-guide tube 41；
G. it opens pressure regulator valve c 42 and adjusts venting pressure to 200kPa, carbon dioxide gas is made to pass through tubular pole 29 of breathing freely
Diffuse in 23 body of magnesia cement soil mixing pile, to magnesia cement soil stirring pile body 23 carry out ventilation carbonization 4.5 h after shape
At carbonization mixing pile 43, the construction of the ventilative pipe pile composite foundation of carbonization mixing pile-is completed.
Embodiment 3
If subsoil is silt, away within the scope of earth's surface 3m, subsoil moisture content is less than 10%；Away from earth's surface 3-8
Within the scope of m, subsoil moisture content is 10%-20%；When being greater than 8 m away from earth's surface depth, subsoil moisture content is greater than 20%.
The powder volume of magnesia cement is selected as 10%, selects the mixture of activated magnesia and lime, mixing ratio 1:1, by water/do
Powder mass ratio produces magnesia cement slurries for 0.8.According to design requirement, the diameter of mixing pile is set to 1400 mm, stirs depth
It is set to 20 m, the outer diameter for tubular pole 29 of breathing freely is 600 mm, and the length of single ventilative tubular pole 29 is 10 m.
The specific steps of construction are as follows:
A. 10 perpendicular alignmnet subsoil of hollow drill 4 and augers is first set into fixed pile；
B. starting mixing pile machine is to injection state, until by 20m depth under 10 spinning injection to earth's surface of augers,
Augers 10 cuts silt, and stirring blade 6 stirs silt；
C. starting mixing pile machine in away from 8 m of earth's surface depth bounds below, is sprayed to state is promoted using dry sprayig process
Magnesia cement powder is stirred and is promoted while spraying magnesia cement powder, in the range of away from earth's surface 3-8m, using dusting
Method and mortar gunite method carry out simultaneously, in the range of away from 3 m of earth's surface, spray magnesia cement using mortar gunite method, complete magnesia water
The first one-step forming of soil stirring pile body 23；
D. brill is bored and mentioned down again in the way of in step b, c, magnesia cement soil mixing pile 23 is carried out once multiple
It stirs, until magnesia cement is uniformly distributed in magnesia cement soil mixing pile 23；
E. and then, first ventilative tubular pole 29 is vertically pressed by magnesia cement soil mixing pile by vibration hammer play
In 23, when the top of first ventilative tubular pole 29 is close to subsoil ground surface, second ventilative tubular pole 29 is promoted, by second
The bottom of the ventilative tubular pole 29 of root and the top of first ventilative tubular pole 29 are affixed, then beat the top of second ventilative tubular pole 29
Portion makes in two ventilative 29 drop-over of tubular pole indentation magnesia cement soil mixing piles 23；
F. in the top indentation sealing cover 35 of magnesia cement soil mixing pile 23 and ventilative tubular pole 29, wherein seal closure
Diameter is 1500mm, Sidewall Height 1000mm, and gas-guide tube 41 is inserted into ventilative tubular pole 29；
G. it opens pressure regulator valve c 42 and adjusts venting pressure to 300 kPa, carbon dioxide gas is made to pass through tubular pole 29 of breathing freely
It diffuses in magnesia cement soil mixing pile 23, forms carbonization after carrying out ventilation carbonization 6.0h to magnesia cement soil mixing pile 23
Mixing pile 43 completes the construction of the ventilative pipe pile composite foundation of carbonization mixing pile-.
Embodiment 4
If subsoil is clay, away within the scope of earth's surface 5m, subsoil moisture content is less than 10%-20%；Away from earth's surface
When depth is greater than 8 m, subsoil moisture content is greater than 20%.The powder volume of magnesia cement is selected as 15%, selects active oxidation
The mixture of magnesium and lime, mixing ratio 2:1.According to design requirement, the diameter of mixing pile is set to 1400 mm, and stirring depth is fixed
For 16m, the outer diameter for tubular pole 29 of breathing freely is 800 mm, and the length of single ventilative tubular pole 29 is 10 m.
The specific steps of construction are as follows:
A. 10 perpendicular alignmnet subsoil of hollow drill 4 and augers is first set into fixed pile；
B. starting mixing pile machine is to injection state, until by 16 m depths under 10 spinning injection to earth's surface of augers,
Augers 10 cuts clay, and stirring blade 6 stirs clay；
C. starting mixing pile machine in away from 8 m of earth's surface depth bounds below, is sprayed to state is promoted using dry sprayig process
Magnesia cement powder is stirred and is promoted while spraying magnesia cement powder, in the range of away from earth's surface 5m, using mortar gunite method
Magnesia cement is sprayed with powder injection process, completes the first one-step forming of magnesia cement soil mixing pile 23；
D. brill is bored and mentioned down again in the way of in step b, c, magnesia cement soil mixing pile 23 is carried out secondary multiple
It stirs, until magnesia cement is uniformly distributed in magnesia cement soil mixing pile 23；
E. and then, first ventilative tubular pole 29 is vertically pressed by magnesia cement soil mixing pile by vibration hammer play
In 23, when ground surface of the top of first ventilative tubular pole 29 close to subsoil, second ventilative tubular pole 29 is promoted, by the
The bottom of two ventilative tubular poles 29 and the top of first ventilative tubular pole 29 are affixed, then beat the top of second ventilative tubular pole 29
Portion makes in two ventilative 29 drop-over of tubular pole indentation magnesia cement soil mixing piles 23, wherein the hollow company of two ventilative tubular poles 29
It is logical；
F. the casting concrete in the ventilative tubular pole 29 of bottom, pours with a thickness of 4m.Then, magnesia cement soil stirs
The top indentation sealing cover 35 of stake 23 and ventilative tubular pole 29, wherein the diameter of seal closure 35 is 1500mm, Sidewall Height is
1000mm, and gas-guide tube 41 is inserted into ventilative tubular pole 29；
G. it opens pressure regulator valve c 42 and adjusts venting pressure to 400 kPa, carbon dioxide gas is made to pass through tubular pole 29 of breathing freely
It diffuses in magnesia cement soil mixing pile 23, ventilation carbonization 12.0h is carried out to magnesia cement soil stirring pile body 23 and forms carbon
Change mixing pile 43, completes the construction of the ventilative pipe pile composite foundation of carbonization mixing pile-.
Embodiment 5
If 1 upper layer 2m of subsoil is sand, centre 2-10 m is silt, 10m the following are when clay, away from earth's surface 2m range
Interior, the moisture content of subsoil is less than 10%；Within the scope of intermediate 2-10m, subsoil moisture content is less than 10%-20%；Away from ground
When table depth is greater than 10 m, subsoil moisture content is greater than 20%.The powder volume of magnesia cement is selected as 15%, selects active oxygen
Change the mixture of magnesium, lime and cement, mixing ratio 1:1:1.According to design requirement, mixing pile diameter is set to 1200 mm, stirring
Depth is set to 20m, and the outer diameter for tubular pole 29 of breathing freely is 600 mm, and the length of single ventilative tubular pole 29 is 10 m.
The specific steps of construction are as follows:
A. 10 perpendicular alignmnet subsoil of hollow drill 4 and augers is first set into fixed pile；
B. starting mixing pile machine is to injection state, until by 20m depth under 10 spinning injection to earth's surface of augers,
Augers 10 cuts subsoil, and stirring blade 6 stirs the soil body.
C. starting mixing pile machine is to state is promoted, according to design requirement, in away from 10 m of earth's surface depth bounds below,
Magnesia cement powder is sprayed using dry sprayig process, stirs and is promoted while spraying magnesia cement powder, in the model away from 2 m of earth's surface
In enclosing, magnesia cement is sprayed using mortar gunite method and powder injection process, within the scope of intermediate 2-10m, magnesia is sprayed using slurry spray
Cement completes the first one-step forming of magnesia cement soil stirring pile body 23；
D. brill is bored and mentioned down again in the way of in step b, c, magnesia cement soil mixing pile 23 is carried out secondary multiple
It stirs, until magnesia cement is uniformly distributed in magnesia cement soil mixing pile 23, which is equally also required to stirring blade 6
Diameter adjusts accordingly；
E. and then, first ventilative tubular pole 29 is vertically pressed by magnesia cement soil mixing pile by vibration hammer play
In 23, when the top of first ventilative tubular pole 29 is close to subsoil ground surface, second ventilative tubular pole 29 is promoted, by second
The bottom of the ventilative tubular pole 29 of root and the top of first ventilative tubular pole 29 are affixed, then beat the top of second ventilative tubular pole 29
Portion makes in two ventilative 29 drop-over of tubular pole indentation magnesia cement soil mixing piles 23, wherein the hollow company of two ventilative tubular poles 29
It is logical；
F. the top indentation sealing cover 35 of magnesia cement soil mixing pile 23 and ventilative tubular pole 29, wherein seal closure is straight
Diameter is 1500mm, Sidewall Height 1000mm, and gas-guide tube 35 is inserted into ventilative tubular pole 29；
G. it opens pressure regulator valve c 42 and adjusts venting pressure to 400 kPa, carbon dioxide gas is made to pass through tubular pole 29 of breathing freely
It diffuses in magnesia cement soil mixing pile 23, forms carbonization after carrying out ventilation carbonization 8.0h to magnesia cement soil mixing pile 23
Mixing pile 43 completes the construction of the ventilative pipe pile composite foundation of carbonization mixing pile-.
Claims (3)
- The constructing device of pipe pile composite foundation 1. a kind of carbonization mixing pile-is breathed freely, it is characterised in that: the constructing device includes:Mixing pile producing device, the mixing pile producing device include support frame (2), and the support frame is provided on (2) Power head (3), power head (3) lower part are connected with hollow drill (4), are installed with shotcrete pipe in the hollow drill (4) (5), the bottom of the hollow drill (4) is fixedly connected with augers (10), hollow drill (4) and augers (10) it Between be fixed with stirring blade (6), the stirring blade (6) lower part be equipped with sawtooth head (7), in stirring blade (6) and auger Gunniting hole (8) and powder injection hole (9) are provided between head (10), the gunniting hole (8) and shotcrete pipe (5) are tightly connected, described Powder injection hole (9) connect with the bottom of hollow drill (4)；Moisture content probe is additionally provided in the bottom of augers (10) (11)；Shotcrete pipe (5) is connect by feed pipe for mortar (18) with slurry can (12) sealed bottom, and the feed pipe for mortar is provided on (18) Flow valve a(19)；Hollow drill (4) is connect by duff pipe (20) with storage powder tank (13) sealed bottom, the duff pipe (20) flow valve b(21 is provided on)；Pass through snorkel (16) at the top of the slurry can (12) and at the top of storage powder tank (13) Connect with compression pump (17), be provided with pressure regulator valve a(14 between snorkel (16) and slurry can (12)), snorkel (16) with Pressure regulator valve b(15 is provided between storage powder tank (13))；It further include compression pump (17) and control system (22), the support frame (2), slurry can (12), storage powder tank (13), compression pump (17) and control system (22) are arranged on stride vehicle (1)；Described contains Water rate probe (11), flow valve a(19) and flow valve b(21) be both connected on control system (22)；Ventilative tubular pole perforation device, the ventilative tubular pole perforation device includes chassis (24), handling apparatus and piling system (28)；The chassis (24) is arranged on stride vehicle (1), and the handling apparatus includes dynamical system (25), upending frame (26) and suspension hook (27), the dynamical system (25) in the handling apparatus and piling system (28) are fixed on chassis (24)；Carbonizing plant is sealed, the sealing carbonizing plant includes seal closure (35), and the seal closure (35) is by being sequentially connected Connecting rod (34), hydraulic stem (33), power arm (32) be connected to hydraulic device (31)；Hydraulic device (31) setting is flat On wooden handcart (30)；Centralized control equipment (39) and feeder (40) are additionally provided on the flat car (30), feeder (40) is logical It crosses gas-guide tube (41) and is connected to the fast joint (38) being arranged at the top of seal closure (35), be provided with pressure regulator valve c on gas-guide tube (41) (42)；Described seal closure (35) side wall is installed on temperature sensor (36) and moisture sensor (37)；The temperature passes Sensor (36), moisture sensor (37) and pressure regulator valve c(42) it is both connected on centralized control equipment (39).
- The constructing device of pipe pile composite foundation 2. carbonization mixing pile-according to claim 1 is breathed freely, it is characterised in that: institute Stating power arm (32) is to be connected to be formed by two section power forearms.
- The constructing device of pipe pile composite foundation 3. carbonization mixing pile-according to claim 1 is breathed freely, it is characterised in that: institute It is triangular in shape to state upending frame (26), suspension hook (27) is fixed on vertex.
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| GB1235188A (en) * | 1967-06-12 | 1971-06-09 | Takenaka Komuten Co | Improvements in or relating to methods of sealing or stabilizing porous structures or formations |
| DE1966479C3 (en) * | 1968-03-21 | 1981-07-23 | Kabushiki Kaisha Takenaka Komuten, Osaka | Process for the production of grouting anchors or piles provided with foot extensions in the ground |
| CN103981854B (en) * | 2014-05-15 | 2015-10-28 | 东南大学 | A kind for the treatment of system for ground stabilization and carbonization piling method |
| CN104110023A (en) * | 2014-07-31 | 2014-10-22 | 东南大学 | Device for processing lead pollution foundation by carbonization acceleration and operating method |
| CN204728319U (en) * | 2015-03-24 | 2015-10-28 | 中交一航局第四工程有限公司 | A kind of cement mixing pile construction equipment of measurable slurry flow |
| CN104912056B (en) * | 2015-06-23 | 2016-08-17 | 东南大学 | A kind of shallow-layer soft foundation in-situ carburization solidification processing system |
| CN105113497B (en) * | 2015-08-11 | 2017-08-08 | 山西省交通科学研究院 | A kind of undisturbed carbonization stake pile-forming equipment and its construction method |
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